/*
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public
    License as published by the Free Software Foundation; either
    version 2 of the license, or (at your option) any later version.
*/

package org.gjt.jclasslib.structures.attributes;

import org.gjt.jclasslib.structures.AttributeInfo;
import org.gjt.jclasslib.structures.InvalidByteCodeException;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;

/**
 * Describes a <tt>SourceFile</tt> attribute structure.
 *
 * @author <a href="mailto:jclasslib@ej-technologies.com">Ingo Kegel</a>
 * @version $Revision: 1.1 $ $Date: 2005/11/01 13:18:24 $
 */
public class SourceFileAttribute extends AttributeInfo {

    /**
     * Name of the attribute as in the corresponding constant pool entry.
     */
    public static final String ATTRIBUTE_NAME = "SourceFile";

    private static final int LENGTH = 2;

    private int sourcefileIndex;

    /**
     * Get the constant pool index of the name of the source file.
     *
     * @return the index
     */
    public int getSourcefileIndex() {
        return sourcefileIndex;
    }

    /**
     * Set the constant pool index of the name of the source file.
     *
     * @param sourcefileIndex the index
     */
    public void setSourcefileIndex(int sourcefileIndex) {
        this.sourcefileIndex = sourcefileIndex;
    }

    public void read(DataInput in)
            throws InvalidByteCodeException, IOException {

        sourcefileIndex = in.readUnsignedShort();
        if (debug) debug("read ");
    }

    public void write(DataOutput out)
            throws InvalidByteCodeException, IOException {

        super.write(out);
        out.writeShort(sourcefileIndex);
        if (debug) debug("wrote ");
    }

    public int getAttributeLength() {
        return LENGTH;
    }

    protected void debug(String message) {
        super.debug(message + "SourceFile attribute with sourcefile_index " + sourcefileIndex);
    }

}
